fix(xcat-core): the Ubuntu Genesis image ships without a DHCP client

builddeb-genesis-base installs its build root from REQUIRED_PACKAGES. That list
has no isc-dhcp-client, no ifenslave and no util-linux-extra, so dracut cannot
find dhclient, ifenslave or hwclock. dracut_install prints one line for each and
returns, the script never reads dracut's result, and the .deb is packaged with
three holes. A Genesis image with no dhclient never obtains a provisioning lease.

Add the three packages, and run verify-genesis-payload on the extracted payload
before dpkg-buildpackage. --commands-from reads the command names back from the
module that is about to be built, so a later addition to the module is checked
too. This is what xCAT-genesis-base.spec already does for EL.

genesis_ubuntu_build_root.t fails five of its eight assertions without this
change.

Signed-off-by: Daniel Hilst <392820+dhilst@users.noreply.github.com>

xCAT-genesis-builder/builddeb-genesis-base

@@ -30,6 +30,7 @@ REQUIRED_PACKAGES="
     nfs-common rpcbind pciutils usbutils parted
     dosfstools e2fsprogs lvm2 mdadm net-tools
     bc psmisc rsync wget cpio
+    isc-dhcp-client ifenslave util-linux-extra
     dpkg-dev debhelper fakeroot devscripts vim-tiny
 "
 if [ "$BUILDARCH" = "amd64" ]; then
@@ -141,6 +142,11 @@ fi
 echo "Adding kernel $KERNEL_IMAGE"
 cp "$KERNEL_IMAGE" "$GENESIS_ROOT/kernel"
 
+# dracut_install reports a missing command and returns, so a hole reaches the .deb with
+# nothing in the log but one line. Read the commands back from the module and check them
+# against the payload, the way xCAT-genesis-base.spec does for EL.
+bash "$DIR/verify-genesis-payload" --commands-from "$DRACUTMODDIR/module-setup.sh" "$GENESIS_FS"
+
 find "$GENESIS_TMPDIR" -type c -delete
 
 # Stage for dpkg-buildpackage